package cn.lynu.book.chapter04.example4_18;

public class Example4_18 {
   public static void main(String args[ ]) {
      char a[]={'a','b','c','D','E','F'};
      for(int i=0;i<a.length;i++) {
          if(Character.isLowerCase(a[i])) {
             a[i]=Character.toUpperCase(a[i]);
         }
         else if(Character.isUpperCase(a[i])) {
             a[i]=Character.toLowerCase(a[i]);
         }
       }
       for(int i=0;i<a.length;i++) {
           System.out.print(" "+a[i]);
       }     
   } 
}
